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| author | Xiaolin Tang <tangxiaolin@loongson.cn> | 2022-11-23 11:45:00 +0800 |
|---|---|---|
| committer | caiyinyu <caiyinyu@loongson.cn> | 2022-11-29 16:00:28 +0800 |
| commit | 2e2485ce05bce85bf092ba0752854afa14b92dad (patch) | |
| tree | 4138377bc399d8368b1e838941f12889ff4c8495 /sysdeps/ieee754/ldbl-128/s_logbl.c | |
| parent | f711e4ef53990b6c76f2dfdbcb9f791c541cdac3 (diff) | |
| download | glibc-2e2485ce05bce85bf092ba0752854afa14b92dad.tar.gz glibc-2e2485ce05bce85bf092ba0752854afa14b92dad.tar.xz glibc-2e2485ce05bce85bf092ba0752854afa14b92dad.zip | |
Use GCC builtins for logb functions if desired.
This patch is using the corresponding GCC builtin for logbf, logb, logbl and logbf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins-function.h. Co-Authored-By: Xi Ruoyao <xry111@xry111.site>
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/s_logbl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_logbl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_logbl.c b/sysdeps/ieee754/ldbl-128/s_logbl.c index 1c56eda499..59b08aa295 100644 --- a/sysdeps/ieee754/ldbl-128/s_logbl.c +++ b/sysdeps/ieee754/ldbl-128/s_logbl.c @@ -25,10 +25,15 @@ static char rcsid[] = "$NetBSD: $"; #include <math.h> #include <math_private.h> #include <libm-alias-ldouble.h> +#include <math-use-builtins.h> _Float128 __logbl (_Float128 x) { +#if USE_LOGBL_BUILTIN + return __builtin_logbl (x); +#else + /* Use generic implementation. */ int64_t lx, hx, ex; GET_LDOUBLE_WORDS64 (hx, lx, x); @@ -49,6 +54,7 @@ __logbl (_Float128 x) ex -= ma - 16; } return (_Float128) (ex - 16383); +#endif /* ! USE_LOGBL_BUILTIN */ } libm_alias_ldouble (__logb, logb) |